java - 使用嵌入对象覆盖外键列名称

Question

如果可嵌入对象已定义与实体的 OneToOne 关系。使用 Embeddable 对象的实体如何覆盖关系的列名称。

使用以下实体:

@Entity
public class User {

    @Id
    private int id;
    @Embedded
    private CubeLocation cubeLocation;
}

@Embeddable
public class CubeLocation { 
    @OneToOne
    private MailBox mailBox;            
    // .. other non-relevant fields
}

@Entity
public class MailBox {  
    @Id
    private String name;
    private String cell;
}

用户实体的数据库表将包含列 ID 和 MAILBOX_NAME。如何将数据库列的名称从 MAILBOX_NAME 更改为 MBX_ID？

我尝试为 User 实体定义 AssociationOverride 注释，但在这种情况下我收到此错误:

    @Entity
    @AssociationOverride(
            name="cubeLocation.mailBox",
            joinColumns=@JoinColumn(name="MBX_ID"))
    public class User {
    }

错误:

org.hibernate.AnnotationException: Illegal attempt to define a @JoinColumn with a mappedBy association: cubeLocation.mailBox

Answer 1

关联覆盖应该在可嵌入的情况下进行:

@Entity
public class User {

    @Id
    private int id;

    @Embedded
    @AssociationOverride(
            name="mailBox",
            joinColumns=@JoinColumn(name="MBX_ID"))
    private CubeLocation cubeLocation;
}